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Yes you can. You can encrypt old and new forms alike. Just change the settings in the form builder. Here is our full guide on encrypted forms:
If you have any further questions, let us know and we will be happy to help.
I'm sorry, a real novice! But very grateful for the encryption!
Once I have downloaded the private key, how is this used? Is it like a password, or just something that means I can only open on my own laptop? Is it possible to give different people the access to that key?
Don't understand really what the key is!
Jude, the private key is a special code that is required in order for the submissions to be decrypted. It is much like a password. Only the people with access to your private key can view your encrypted submissions.
You will not be able to view your submissions on other devices if you do not take your private key file with you onto that other device. This makes it a very good way to encrypt and protect your data in such a way that you and only you are able to view your data. However, if you were ever to lose your private key, the encrypted data would become lost, as there is no way for us to decrypt your submissions without the private key.
So if you wish to receive and use encrypted submissions, you should take a really good care of your private key, and make a precautionary backup of it on another device in case your computer/phone gets damaged.
I would advise you not to use encryption on your production forms for now, until you have a little better understanding on what this means, and how your submissions work when they are encrypted. You can test the encryption on your new forms, and see if it is something that you will use - it is easy to apply it to any of your old forms.
You can turn it on or off in any specific form by going to Preferences > Advanced Settings, and turning Encrypt Form Data to Yes or No. I hope this helps.